Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11063684 | Optical transmission system, optical transmission apparatus and transmission method | Ryo KARUBE, Tomoaki Takeyama, Shinichirou Muro | 2021-07-13 |
| 8564876 | Raman amplifier and raman amplifier adjustment method | Maki Hiraizumi, Masao Nakata | 2013-10-22 |
| 8339698 | Raman amplifier and raman amplifier adjustment method | Maki Hiraizumi, Masao Nakata | 2012-12-25 |
| 7929201 | Multistage optical amplifier with gain control using pump ratio | Tatsuya Tsuzuki, Norifumi Shukunami, Yuji Tamura, Masao Nakata, Takashi Satou | 2011-04-19 |
| 7612936 | Optical amplifying apparatus for wavelength division multiplexed signals | Kaoru Usui, Hiroshi Iizuka, Hiroyuki Itou | 2009-11-03 |
| 7554721 | Raman amplifier and Raman amplifier adjustment method | Maki Hiraizumi, Masao Nakata | 2009-06-30 |
| 7145717 | Optical amplifier | Masao Nakata, Kosuke Komaki | 2006-12-05 |
| 6181854 | Optical module packaged with molded resin | Takashi Kojima, Naoki Yamamoto, Hironao Hakogi, Kazunori Miura | 2001-01-30 |
| 5814871 | Optical semiconductor assembly having a conductive float pad | Hiroyuki Furukawa, Hironao Hakogi | 1998-09-29 |